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TOMOYO Linux Cross Reference
Linux/Documentation/process/changes.rst

Version: ~ [ linux-6.11.5 ] ~ [ linux-6.10.14 ] ~ [ linux-6.9.12 ] ~ [ linux-6.8.12 ] ~ [ linux-6.7.12 ] ~ [ linux-6.6.58 ] ~ [ linux-6.5.13 ] ~ [ linux-6.4.16 ] ~ [ linux-6.3.13 ] ~ [ linux-6.2.16 ] ~ [ linux-6.1.114 ] ~ [ linux-6.0.19 ] ~ [ linux-5.19.17 ] ~ [ linux-5.18.19 ] ~ [ linux-5.17.15 ] ~ [ linux-5.16.20 ] ~ [ linux-5.15.169 ] ~ [ linux-5.14.21 ] ~ [ linux-5.13.19 ] ~ [ linux-5.12.19 ] ~ [ linux-5.11.22 ] ~ [ linux-5.10.228 ] ~ [ linux-5.9.16 ] ~ [ linux-5.8.18 ] ~ [ linux-5.7.19 ] ~ [ linux-5.6.19 ] ~ [ linux-5.5.19 ] ~ [ linux-5.4.284 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.322 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.336 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.337 ] ~ [ linux-4.4.302 ] ~ [ linux-3.10.108 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.9 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

Diff markup

Differences between /Documentation/process/changes.rst (Architecture mips) and /Documentation/process/changes.rst (Architecture sparc)


  1 .. _changes:                                        1 .. _changes:
  2                                                     2 
  3 Minimal requirements to compile the Kernel          3 Minimal requirements to compile the Kernel
  4 ++++++++++++++++++++++++++++++++++++++++++          4 ++++++++++++++++++++++++++++++++++++++++++
  5                                                     5 
  6 Intro                                               6 Intro
  7 =====                                               7 =====
  8                                                     8 
  9 This document is designed to provide a list of      9 This document is designed to provide a list of the minimum levels of
 10 software necessary to run the current kernel v     10 software necessary to run the current kernel version.
 11                                                    11 
 12 This document is originally based on my "Chang     12 This document is originally based on my "Changes" file for 2.0.x kernels
 13 and therefore owes credit to the same people a     13 and therefore owes credit to the same people as that file (Jared Mauch,
 14 Axel Boldt, Alessandro Sigala, and countless o     14 Axel Boldt, Alessandro Sigala, and countless other users all over the
 15 'net).                                             15 'net).
 16                                                    16 
 17 Current Minimal Requirements                       17 Current Minimal Requirements
 18 ****************************                       18 ****************************
 19                                                    19 
 20 Upgrade to at **least** these software revisio     20 Upgrade to at **least** these software revisions before thinking you've
 21 encountered a bug!  If you're unsure what vers     21 encountered a bug!  If you're unsure what version you're currently
 22 running, the suggested command should tell you     22 running, the suggested command should tell you.
 23                                                    23 
 24 Again, keep in mind that this list assumes you     24 Again, keep in mind that this list assumes you are already functionally
 25 running a Linux kernel.  Also, not all tools a     25 running a Linux kernel.  Also, not all tools are necessary on all
 26 systems; obviously, if you don't have any PC C     26 systems; obviously, if you don't have any PC Card hardware, for example,
 27 you probably needn't concern yourself with pcm     27 you probably needn't concern yourself with pcmciautils.
 28                                                    28 
 29 ====================== ===============  ======     29 ====================== ===============  ========================================
 30         Program        Minimal version       C     30         Program        Minimal version       Command to check the version
 31 ====================== ===============  ======     31 ====================== ===============  ========================================
 32 GNU C                  5.1              gcc --     32 GNU C                  5.1              gcc --version
 33 Clang/LLVM (optional)  13.0.1           clang      33 Clang/LLVM (optional)  13.0.1           clang --version
 34 Rust (optional)        1.78.0           rustc      34 Rust (optional)        1.78.0           rustc --version
 35 bindgen (optional)     0.65.1           bindge     35 bindgen (optional)     0.65.1           bindgen --version
 36 GNU make               4.0              make -     36 GNU make               4.0              make --version
 37 bash                   4.2              bash -     37 bash                   4.2              bash --version
 38 binutils               2.25             ld -v      38 binutils               2.25             ld -v
 39 flex                   2.5.35           flex -     39 flex                   2.5.35           flex --version
 40 bison                  2.0              bison      40 bison                  2.0              bison --version
 41 pahole                 1.16             pahole     41 pahole                 1.16             pahole --version
 42 util-linux             2.10o            mount      42 util-linux             2.10o            mount --version
 43 kmod                   13               depmod     43 kmod                   13               depmod -V
 44 e2fsprogs              1.41.4           e2fsck     44 e2fsprogs              1.41.4           e2fsck -V
 45 jfsutils               1.1.3            fsck.j     45 jfsutils               1.1.3            fsck.jfs -V
 46 reiserfsprogs          3.6.3            reiser     46 reiserfsprogs          3.6.3            reiserfsck -V
 47 xfsprogs               2.6.0            xfs_db     47 xfsprogs               2.6.0            xfs_db -V
 48 squashfs-tools         4.0              mksqua     48 squashfs-tools         4.0              mksquashfs -version
 49 btrfs-progs            0.18             btrfsc     49 btrfs-progs            0.18             btrfsck
 50 pcmciautils            004              pccard     50 pcmciautils            004              pccardctl -V
 51 quota-tools            3.09             quota      51 quota-tools            3.09             quota -V
 52 PPP                    2.4.0            pppd -     52 PPP                    2.4.0            pppd --version
 53 nfs-utils              1.0.5            showmo     53 nfs-utils              1.0.5            showmount --version
 54 procps                 3.2.0            ps --v     54 procps                 3.2.0            ps --version
 55 udev                   081              udevd      55 udev                   081              udevd --version
 56 grub                   0.93             grub -     56 grub                   0.93             grub --version || grub-install --version
 57 mcelog                 0.6              mcelog     57 mcelog                 0.6              mcelog --version
 58 iptables               1.4.2            iptabl     58 iptables               1.4.2            iptables -V
 59 openssl & libcrypto    1.0.0            openss     59 openssl & libcrypto    1.0.0            openssl version
 60 bc                     1.06.95          bc --v     60 bc                     1.06.95          bc --version
 61 Sphinx\ [#f1]_         2.4.4            sphinx     61 Sphinx\ [#f1]_         2.4.4            sphinx-build --version
 62 cpio                   any              cpio -     62 cpio                   any              cpio --version
 63 GNU tar                1.28             tar --     63 GNU tar                1.28             tar --version
 64 gtags (optional)       6.6.5            gtags      64 gtags (optional)       6.6.5            gtags --version
 65 mkimage (optional)     2017.01          mkimag     65 mkimage (optional)     2017.01          mkimage --version
 66 Python (optional)      3.5.x            python     66 Python (optional)      3.5.x            python3 --version
 67 ====================== ===============  ======     67 ====================== ===============  ========================================
 68                                                    68 
 69 .. [#f1] Sphinx is needed only to build the Ke     69 .. [#f1] Sphinx is needed only to build the Kernel documentation
 70                                                    70 
 71 Kernel compilation                                 71 Kernel compilation
 72 ******************                                 72 ******************
 73                                                    73 
 74 GCC                                                74 GCC
 75 ---                                                75 ---
 76                                                    76 
 77 The gcc version requirements may vary dependin     77 The gcc version requirements may vary depending on the type of CPU in your
 78 computer.                                          78 computer.
 79                                                    79 
 80 Clang/LLVM (optional)                              80 Clang/LLVM (optional)
 81 ---------------------                              81 ---------------------
 82                                                    82 
 83 The latest formal release of clang and LLVM ut     83 The latest formal release of clang and LLVM utils (according to
 84 `releases.llvm.org <https://releases.llvm.org>     84 `releases.llvm.org <https://releases.llvm.org>`_) are supported for building
 85 kernels. Older releases aren't guaranteed to w     85 kernels. Older releases aren't guaranteed to work, and we may drop workarounds
 86 from the kernel that were used to support olde     86 from the kernel that were used to support older versions. Please see additional
 87 docs on :ref:`Building Linux with Clang/LLVM <     87 docs on :ref:`Building Linux with Clang/LLVM <kbuild_llvm>`.
 88                                                    88 
 89 Rust (optional)                                    89 Rust (optional)
 90 ---------------                                    90 ---------------
 91                                                    91 
 92 A recent version of the Rust compiler is requi     92 A recent version of the Rust compiler is required.
 93                                                    93 
 94 Please see Documentation/rust/quick-start.rst      94 Please see Documentation/rust/quick-start.rst for instructions on how to
 95 satisfy the build requirements of Rust support     95 satisfy the build requirements of Rust support. In particular, the ``Makefile``
 96 target ``rustavailable`` is useful to check wh     96 target ``rustavailable`` is useful to check why the Rust toolchain may not
 97 be detected.                                       97 be detected.
 98                                                    98 
 99 bindgen (optional)                                 99 bindgen (optional)
100 ------------------                                100 ------------------
101                                                   101 
102 ``bindgen`` is used to generate the Rust bindi    102 ``bindgen`` is used to generate the Rust bindings to the C side of the kernel.
103 It depends on ``libclang``.                       103 It depends on ``libclang``.
104                                                   104 
105 Make                                              105 Make
106 ----                                              106 ----
107                                                   107 
108 You will need GNU make 4.0 or later to build t    108 You will need GNU make 4.0 or later to build the kernel.
109                                                   109 
110 Bash                                              110 Bash
111 ----                                              111 ----
112                                                   112 
113 Some bash scripts are used for the kernel buil    113 Some bash scripts are used for the kernel build.
114 Bash 4.2 or newer is needed.                      114 Bash 4.2 or newer is needed.
115                                                   115 
116 Binutils                                          116 Binutils
117 --------                                          117 --------
118                                                   118 
119 Binutils 2.25 or newer is needed to build the     119 Binutils 2.25 or newer is needed to build the kernel.
120                                                   120 
121 pkg-config                                        121 pkg-config
122 ----------                                        122 ----------
123                                                   123 
124 The build system, as of 4.18, requires pkg-con    124 The build system, as of 4.18, requires pkg-config to check for installed
125 kconfig tools and to determine flags settings     125 kconfig tools and to determine flags settings for use in
126 'make {g,x}config'.  Previously pkg-config was    126 'make {g,x}config'.  Previously pkg-config was being used but not
127 verified or documented.                           127 verified or documented.
128                                                   128 
129 Flex                                              129 Flex
130 ----                                              130 ----
131                                                   131 
132 Since Linux 4.16, the build system generates l    132 Since Linux 4.16, the build system generates lexical analyzers
133 during build.  This requires flex 2.5.35 or la    133 during build.  This requires flex 2.5.35 or later.
134                                                   134 
135                                                   135 
136 Bison                                             136 Bison
137 -----                                             137 -----
138                                                   138 
139 Since Linux 4.16, the build system generates p    139 Since Linux 4.16, the build system generates parsers
140 during build.  This requires bison 2.0 or late    140 during build.  This requires bison 2.0 or later.
141                                                   141 
142 pahole                                            142 pahole
143 ------                                            143 ------
144                                                   144 
145 Since Linux 5.2, if CONFIG_DEBUG_INFO_BTF is s    145 Since Linux 5.2, if CONFIG_DEBUG_INFO_BTF is selected, the build system
146 generates BTF (BPF Type Format) from DWARF in     146 generates BTF (BPF Type Format) from DWARF in vmlinux, a bit later from kernel
147 modules as well.  This requires pahole v1.16 o    147 modules as well.  This requires pahole v1.16 or later.
148                                                   148 
149 It is found in the 'dwarves' or 'pahole' distr    149 It is found in the 'dwarves' or 'pahole' distro packages or from
150 https://fedorapeople.org/~acme/dwarves/.          150 https://fedorapeople.org/~acme/dwarves/.
151                                                   151 
152 Perl                                              152 Perl
153 ----                                              153 ----
154                                                   154 
155 You will need perl 5 and the following modules    155 You will need perl 5 and the following modules: ``Getopt::Long``,
156 ``Getopt::Std``, ``File::Basename``, and ``Fil    156 ``Getopt::Std``, ``File::Basename``, and ``File::Find`` to build the kernel.
157                                                   157 
158 BC                                                158 BC
159 --                                                159 --
160                                                   160 
161 You will need bc to build kernels 3.10 and hig    161 You will need bc to build kernels 3.10 and higher
162                                                   162 
163                                                   163 
164 OpenSSL                                           164 OpenSSL
165 -------                                           165 -------
166                                                   166 
167 Module signing and external certificate handli    167 Module signing and external certificate handling use the OpenSSL program and
168 crypto library to do key creation and signatur    168 crypto library to do key creation and signature generation.
169                                                   169 
170 You will need openssl to build kernels 3.7 and    170 You will need openssl to build kernels 3.7 and higher if module signing is
171 enabled.  You will also need openssl developme    171 enabled.  You will also need openssl development packages to build kernels 4.3
172 and higher.                                       172 and higher.
173                                                   173 
174 Tar                                               174 Tar
175 ---                                               175 ---
176                                                   176 
177 GNU tar is needed if you want to enable access    177 GNU tar is needed if you want to enable access to the kernel headers via sysfs
178 (CONFIG_IKHEADERS).                               178 (CONFIG_IKHEADERS).
179                                                   179 
180 gtags / GNU GLOBAL (optional)                     180 gtags / GNU GLOBAL (optional)
181 -----------------------------                     181 -----------------------------
182                                                   182 
183 The kernel build requires GNU GLOBAL version 6    183 The kernel build requires GNU GLOBAL version 6.6.5 or later to generate
184 tag files through ``make gtags``.  This is due    184 tag files through ``make gtags``.  This is due to its use of the gtags
185 ``-C (--directory)`` flag.                        185 ``-C (--directory)`` flag.
186                                                   186 
187 mkimage                                           187 mkimage
188 -------                                           188 -------
189                                                   189 
190 This tool is used when building a Flat Image T    190 This tool is used when building a Flat Image Tree (FIT), commonly used on ARM
191 platforms. The tool is available via the ``u-b    191 platforms. The tool is available via the ``u-boot-tools`` package or can be
192 built from the U-Boot source code. See the ins    192 built from the U-Boot source code. See the instructions at
193 https://docs.u-boot.org/en/latest/build/tools.    193 https://docs.u-boot.org/en/latest/build/tools.html#building-tools-for-linux
194                                                   194 
195 System utilities                                  195 System utilities
196 ****************                                  196 ****************
197                                                   197 
198 Architectural changes                             198 Architectural changes
199 ---------------------                             199 ---------------------
200                                                   200 
201 DevFS has been obsoleted in favour of udev        201 DevFS has been obsoleted in favour of udev
202 (https://www.kernel.org/pub/linux/utils/kernel    202 (https://www.kernel.org/pub/linux/utils/kernel/hotplug/)
203                                                   203 
204 32-bit UID support is now in place.  Have fun!    204 32-bit UID support is now in place.  Have fun!
205                                                   205 
206 Linux documentation for functions is transitio    206 Linux documentation for functions is transitioning to inline
207 documentation via specially-formatted comments    207 documentation via specially-formatted comments near their
208 definitions in the source.  These comments can    208 definitions in the source.  These comments can be combined with ReST
209 files the Documentation/ directory to make enr    209 files the Documentation/ directory to make enriched documentation, which can
210 then be converted to PostScript, HTML, LaTex,     210 then be converted to PostScript, HTML, LaTex, ePUB and PDF files.
211 In order to convert from ReST format to a form    211 In order to convert from ReST format to a format of your choice, you'll need
212 Sphinx.                                           212 Sphinx.
213                                                   213 
214 Util-linux                                        214 Util-linux
215 ----------                                        215 ----------
216                                                   216 
217 New versions of util-linux provide ``fdisk`` s    217 New versions of util-linux provide ``fdisk`` support for larger disks,
218 support new options to mount, recognize more s    218 support new options to mount, recognize more supported partition
219 types, and similar goodies.                       219 types, and similar goodies.
220 You'll probably want to upgrade.                  220 You'll probably want to upgrade.
221                                                   221 
222 Ksymoops                                          222 Ksymoops
223 --------                                          223 --------
224                                                   224 
225 If the unthinkable happens and your kernel oop    225 If the unthinkable happens and your kernel oopses, you may need the
226 ksymoops tool to decode it, but in most cases     226 ksymoops tool to decode it, but in most cases you don't.
227 It is generally preferred to build the kernel     227 It is generally preferred to build the kernel with ``CONFIG_KALLSYMS`` so
228 that it produces readable dumps that can be us    228 that it produces readable dumps that can be used as-is (this also
229 produces better output than ksymoops).  If for    229 produces better output than ksymoops).  If for some reason your kernel
230 is not build with ``CONFIG_KALLSYMS`` and you     230 is not build with ``CONFIG_KALLSYMS`` and you have no way to rebuild and
231 reproduce the Oops with that option, then you     231 reproduce the Oops with that option, then you can still decode that Oops
232 with ksymoops.                                    232 with ksymoops.
233                                                   233 
234 Mkinitrd                                          234 Mkinitrd
235 --------                                          235 --------
236                                                   236 
237 These changes to the ``/lib/modules`` file tre    237 These changes to the ``/lib/modules`` file tree layout also require that
238 mkinitrd be upgraded.                             238 mkinitrd be upgraded.
239                                                   239 
240 E2fsprogs                                         240 E2fsprogs
241 ---------                                         241 ---------
242                                                   242 
243 The latest version of ``e2fsprogs`` fixes seve    243 The latest version of ``e2fsprogs`` fixes several bugs in fsck and
244 debugfs.  Obviously, it's a good idea to upgra    244 debugfs.  Obviously, it's a good idea to upgrade.
245                                                   245 
246 JFSutils                                          246 JFSutils
247 --------                                          247 --------
248                                                   248 
249 The ``jfsutils`` package contains the utilitie    249 The ``jfsutils`` package contains the utilities for the file system.
250 The following utilities are available:            250 The following utilities are available:
251                                                   251 
252 - ``fsck.jfs`` - initiate replay of the transa    252 - ``fsck.jfs`` - initiate replay of the transaction log, and check
253   and repair a JFS formatted partition.           253   and repair a JFS formatted partition.
254                                                   254 
255 - ``mkfs.jfs`` - create a JFS formatted partit    255 - ``mkfs.jfs`` - create a JFS formatted partition.
256                                                   256 
257 - other file system utilities are also availab    257 - other file system utilities are also available in this package.
258                                                   258 
259 Reiserfsprogs                                     259 Reiserfsprogs
260 -------------                                     260 -------------
261                                                   261 
262 The reiserfsprogs package should be used for r    262 The reiserfsprogs package should be used for reiserfs-3.6.x
263 (Linux kernels 2.4.x). It is a combined packag    263 (Linux kernels 2.4.x). It is a combined package and contains working
264 versions of ``mkreiserfs``, ``resize_reiserfs`    264 versions of ``mkreiserfs``, ``resize_reiserfs``, ``debugreiserfs`` and
265 ``reiserfsck``. These utils work on both i386     265 ``reiserfsck``. These utils work on both i386 and alpha platforms.
266                                                   266 
267 Xfsprogs                                          267 Xfsprogs
268 --------                                          268 --------
269                                                   269 
270 The latest version of ``xfsprogs`` contains ``    270 The latest version of ``xfsprogs`` contains ``mkfs.xfs``, ``xfs_db``, and the
271 ``xfs_repair`` utilities, among others, for th    271 ``xfs_repair`` utilities, among others, for the XFS filesystem.  It is
272 architecture independent and any version from     272 architecture independent and any version from 2.0.0 onward should
273 work correctly with this version of the XFS ke    273 work correctly with this version of the XFS kernel code (2.6.0 or
274 later is recommended, due to some significant     274 later is recommended, due to some significant improvements).
275                                                   275 
276 PCMCIAutils                                       276 PCMCIAutils
277 -----------                                       277 -----------
278                                                   278 
279 PCMCIAutils replaces ``pcmcia-cs``. It properl    279 PCMCIAutils replaces ``pcmcia-cs``. It properly sets up
280 PCMCIA sockets at system startup and loads the    280 PCMCIA sockets at system startup and loads the appropriate modules
281 for 16-bit PCMCIA devices if the kernel is mod    281 for 16-bit PCMCIA devices if the kernel is modularized and the hotplug
282 subsystem is used.                                282 subsystem is used.
283                                                   283 
284 Quota-tools                                       284 Quota-tools
285 -----------                                       285 -----------
286                                                   286 
287 Support for 32 bit uid's and gid's is required    287 Support for 32 bit uid's and gid's is required if you want to use
288 the newer version 2 quota format.  Quota-tools    288 the newer version 2 quota format.  Quota-tools version 3.07 and
289 newer has this support.  Use the recommended v    289 newer has this support.  Use the recommended version or newer
290 from the table above.                             290 from the table above.
291                                                   291 
292 Intel IA32 microcode                              292 Intel IA32 microcode
293 --------------------                              293 --------------------
294                                                   294 
295 A driver has been added to allow updating of I    295 A driver has been added to allow updating of Intel IA32 microcode,
296 accessible as a normal (misc) character device    296 accessible as a normal (misc) character device.  If you are not using
297 udev you may need to::                            297 udev you may need to::
298                                                   298 
299   mkdir /dev/cpu                                  299   mkdir /dev/cpu
300   mknod /dev/cpu/microcode c 10 184               300   mknod /dev/cpu/microcode c 10 184
301   chmod 0644 /dev/cpu/microcode                   301   chmod 0644 /dev/cpu/microcode
302                                                   302 
303 as root before you can use this.  You'll proba    303 as root before you can use this.  You'll probably also want to
304 get the user-space microcode_ctl utility to us    304 get the user-space microcode_ctl utility to use with this.
305                                                   305 
306 udev                                              306 udev
307 ----                                              307 ----
308                                                   308 
309 ``udev`` is a userspace application for popula    309 ``udev`` is a userspace application for populating ``/dev`` dynamically with
310 only entries for devices actually present. ``u    310 only entries for devices actually present. ``udev`` replaces the basic
311 functionality of devfs, while allowing persist    311 functionality of devfs, while allowing persistent device naming for
312 devices.                                          312 devices.
313                                                   313 
314 FUSE                                              314 FUSE
315 ----                                              315 ----
316                                                   316 
317 Needs libfuse 2.4.0 or later.  Absolute minimu    317 Needs libfuse 2.4.0 or later.  Absolute minimum is 2.3.0 but mount
318 options ``direct_io`` and ``kernel_cache`` won    318 options ``direct_io`` and ``kernel_cache`` won't work.
319                                                   319 
320 Networking                                        320 Networking
321 **********                                        321 **********
322                                                   322 
323 General changes                                   323 General changes
324 ---------------                                   324 ---------------
325                                                   325 
326 If you have advanced network configuration nee    326 If you have advanced network configuration needs, you should probably
327 consider using the network tools from ip-route    327 consider using the network tools from ip-route2.
328                                                   328 
329 Packet Filter / NAT                               329 Packet Filter / NAT
330 -------------------                               330 -------------------
331 The packet filtering and NAT code uses the sam    331 The packet filtering and NAT code uses the same tools like the previous 2.4.x
332 kernel series (iptables).  It still includes b    332 kernel series (iptables).  It still includes backwards-compatibility modules
333 for 2.2.x-style ipchains and 2.0.x-style ipfwa    333 for 2.2.x-style ipchains and 2.0.x-style ipfwadm.
334                                                   334 
335 PPP                                               335 PPP
336 ---                                               336 ---
337                                                   337 
338 The PPP driver has been restructured to suppor    338 The PPP driver has been restructured to support multilink and to
339 enable it to operate over diverse media layers    339 enable it to operate over diverse media layers.  If you use PPP,
340 upgrade pppd to at least 2.4.0.                   340 upgrade pppd to at least 2.4.0.
341                                                   341 
342 If you are not using udev, you must have the d    342 If you are not using udev, you must have the device file /dev/ppp
343 which can be made by::                            343 which can be made by::
344                                                   344 
345   mknod /dev/ppp c 108 0                          345   mknod /dev/ppp c 108 0
346                                                   346 
347 as root.                                          347 as root.
348                                                   348 
349 NFS-utils                                         349 NFS-utils
350 ---------                                         350 ---------
351                                                   351 
352 In ancient (2.4 and earlier) kernels, the nfs     352 In ancient (2.4 and earlier) kernels, the nfs server needed to know
353 about any client that expected to be able to a    353 about any client that expected to be able to access files via NFS.  This
354 information would be given to the kernel by ``    354 information would be given to the kernel by ``mountd`` when the client
355 mounted the filesystem, or by ``exportfs`` at     355 mounted the filesystem, or by ``exportfs`` at system startup.  exportfs
356 would take information about active clients fr    356 would take information about active clients from ``/var/lib/nfs/rmtab``.
357                                                   357 
358 This approach is quite fragile as it depends o    358 This approach is quite fragile as it depends on rmtab being correct
359 which is not always easy, particularly when tr    359 which is not always easy, particularly when trying to implement
360 fail-over.  Even when the system is working we    360 fail-over.  Even when the system is working well, ``rmtab`` suffers from
361 getting lots of old entries that never get rem    361 getting lots of old entries that never get removed.
362                                                   362 
363 With modern kernels we have the option of havi    363 With modern kernels we have the option of having the kernel tell mountd
364 when it gets a request from an unknown host, a    364 when it gets a request from an unknown host, and mountd can give
365 appropriate export information to the kernel.     365 appropriate export information to the kernel.  This removes the
366 dependency on ``rmtab`` and means that the ker    366 dependency on ``rmtab`` and means that the kernel only needs to know about
367 currently active clients.                         367 currently active clients.
368                                                   368 
369 To enable this new functionality, you need to:    369 To enable this new functionality, you need to::
370                                                   370 
371   mount -t nfsd nfsd /proc/fs/nfsd                371   mount -t nfsd nfsd /proc/fs/nfsd
372                                                   372 
373 before running exportfs or mountd.  It is reco    373 before running exportfs or mountd.  It is recommended that all NFS
374 services be protected from the internet-at-lar    374 services be protected from the internet-at-large by a firewall where
375 that is possible.                                 375 that is possible.
376                                                   376 
377 mcelog                                            377 mcelog
378 ------                                            378 ------
379                                                   379 
380 On x86 kernels the mcelog utility is needed to    380 On x86 kernels the mcelog utility is needed to process and log machine check
381 events when ``CONFIG_X86_MCE`` is enabled. Mac    381 events when ``CONFIG_X86_MCE`` is enabled. Machine check events are errors
382 reported by the CPU. Processing them is strong    382 reported by the CPU. Processing them is strongly encouraged.
383                                                   383 
384 Kernel documentation                              384 Kernel documentation
385 ********************                              385 ********************
386                                                   386 
387 Sphinx                                            387 Sphinx
388 ------                                            388 ------
389                                                   389 
390 Please see :ref:`sphinx_install` in :ref:`Docu    390 Please see :ref:`sphinx_install` in :ref:`Documentation/doc-guide/sphinx.rst <sphinxdoc>`
391 for details about Sphinx requirements.            391 for details about Sphinx requirements.
392                                                   392 
393 rustdoc                                           393 rustdoc
394 -------                                           394 -------
395                                                   395 
396 ``rustdoc`` is used to generate the documentat    396 ``rustdoc`` is used to generate the documentation for Rust code. Please see
397 Documentation/rust/general-information.rst for    397 Documentation/rust/general-information.rst for more information.
398                                                   398 
399 Getting updated software                          399 Getting updated software
400 ========================                          400 ========================
401                                                   401 
402 Kernel compilation                                402 Kernel compilation
403 ******************                                403 ******************
404                                                   404 
405 gcc                                               405 gcc
406 ---                                               406 ---
407                                                   407 
408 - <ftp://ftp.gnu.org/gnu/gcc/>                    408 - <ftp://ftp.gnu.org/gnu/gcc/>
409                                                   409 
410 Clang/LLVM                                        410 Clang/LLVM
411 ----------                                        411 ----------
412                                                   412 
413 - :ref:`Getting LLVM <getting_llvm>`.             413 - :ref:`Getting LLVM <getting_llvm>`.
414                                                   414 
415 Rust                                              415 Rust
416 ----                                              416 ----
417                                                   417 
418 - Documentation/rust/quick-start.rst.             418 - Documentation/rust/quick-start.rst.
419                                                   419 
420 bindgen                                           420 bindgen
421 -------                                           421 -------
422                                                   422 
423 - Documentation/rust/quick-start.rst.             423 - Documentation/rust/quick-start.rst.
424                                                   424 
425 Make                                              425 Make
426 ----                                              426 ----
427                                                   427 
428 - <ftp://ftp.gnu.org/gnu/make/>                   428 - <ftp://ftp.gnu.org/gnu/make/>
429                                                   429 
430 Bash                                              430 Bash
431 ----                                              431 ----
432                                                   432 
433 - <ftp://ftp.gnu.org/gnu/bash/>                   433 - <ftp://ftp.gnu.org/gnu/bash/>
434                                                   434 
435 Binutils                                          435 Binutils
436 --------                                          436 --------
437                                                   437 
438 - <https://www.kernel.org/pub/linux/devel/binu    438 - <https://www.kernel.org/pub/linux/devel/binutils/>
439                                                   439 
440 Flex                                              440 Flex
441 ----                                              441 ----
442                                                   442 
443 - <https://github.com/westes/flex/releases>       443 - <https://github.com/westes/flex/releases>
444                                                   444 
445 Bison                                             445 Bison
446 -----                                             446 -----
447                                                   447 
448 - <ftp://ftp.gnu.org/gnu/bison/>                  448 - <ftp://ftp.gnu.org/gnu/bison/>
449                                                   449 
450 OpenSSL                                           450 OpenSSL
451 -------                                           451 -------
452                                                   452 
453 - <https://www.openssl.org/>                      453 - <https://www.openssl.org/>
454                                                   454 
455 System utilities                                  455 System utilities
456 ****************                                  456 ****************
457                                                   457 
458 Util-linux                                        458 Util-linux
459 ----------                                        459 ----------
460                                                   460 
461 - <https://www.kernel.org/pub/linux/utils/util    461 - <https://www.kernel.org/pub/linux/utils/util-linux/>
462                                                   462 
463 Kmod                                              463 Kmod
464 ----                                              464 ----
465                                                   465 
466 - <https://www.kernel.org/pub/linux/utils/kern    466 - <https://www.kernel.org/pub/linux/utils/kernel/kmod/>
467 - <https://git.kernel.org/pub/scm/utils/kernel    467 - <https://git.kernel.org/pub/scm/utils/kernel/kmod/kmod.git>
468                                                   468 
469 Ksymoops                                          469 Ksymoops
470 --------                                          470 --------
471                                                   471 
472 - <https://www.kernel.org/pub/linux/utils/kern    472 - <https://www.kernel.org/pub/linux/utils/kernel/ksymoops/v2.4/>
473                                                   473 
474 Mkinitrd                                          474 Mkinitrd
475 --------                                          475 --------
476                                                   476 
477 - <https://code.launchpad.net/initrd-tools/mai    477 - <https://code.launchpad.net/initrd-tools/main>
478                                                   478 
479 E2fsprogs                                         479 E2fsprogs
480 ---------                                         480 ---------
481                                                   481 
482 - <https://www.kernel.org/pub/linux/kernel/peo    482 - <https://www.kernel.org/pub/linux/kernel/people/tytso/e2fsprogs/>
483 - <https://git.kernel.org/pub/scm/fs/ext2/e2fs    483 - <https://git.kernel.org/pub/scm/fs/ext2/e2fsprogs.git/>
484                                                   484 
485 JFSutils                                          485 JFSutils
486 --------                                          486 --------
487                                                   487 
488 - <https://jfs.sourceforge.net/>                  488 - <https://jfs.sourceforge.net/>
489                                                   489 
490 Reiserfsprogs                                     490 Reiserfsprogs
491 -------------                                     491 -------------
492                                                   492 
493 - <https://git.kernel.org/pub/scm/linux/kernel    493 - <https://git.kernel.org/pub/scm/linux/kernel/git/jeffm/reiserfsprogs.git/>
494                                                   494 
495 Xfsprogs                                          495 Xfsprogs
496 --------                                          496 --------
497                                                   497 
498 - <https://git.kernel.org/pub/scm/fs/xfs/xfspr    498 - <https://git.kernel.org/pub/scm/fs/xfs/xfsprogs-dev.git>
499 - <https://www.kernel.org/pub/linux/utils/fs/x    499 - <https://www.kernel.org/pub/linux/utils/fs/xfs/xfsprogs/>
500                                                   500 
501 Pcmciautils                                       501 Pcmciautils
502 -----------                                       502 -----------
503                                                   503 
504 - <https://www.kernel.org/pub/linux/utils/kern    504 - <https://www.kernel.org/pub/linux/utils/kernel/pcmcia/>
505                                                   505 
506 Quota-tools                                       506 Quota-tools
507 -----------                                       507 -----------
508                                                   508 
509 - <https://sourceforge.net/projects/linuxquota    509 - <https://sourceforge.net/projects/linuxquota/>
510                                                   510 
511                                                   511 
512 Intel P6 microcode                                512 Intel P6 microcode
513 ------------------                                513 ------------------
514                                                   514 
515 - <https://downloadcenter.intel.com/>             515 - <https://downloadcenter.intel.com/>
516                                                   516 
517 udev                                              517 udev
518 ----                                              518 ----
519                                                   519 
520 - <https://www.freedesktop.org/software/system    520 - <https://www.freedesktop.org/software/systemd/man/udev.html>
521                                                   521 
522 FUSE                                              522 FUSE
523 ----                                              523 ----
524                                                   524 
525 - <https://github.com/libfuse/libfuse/releases    525 - <https://github.com/libfuse/libfuse/releases>
526                                                   526 
527 mcelog                                            527 mcelog
528 ------                                            528 ------
529                                                   529 
530 - <https://www.mcelog.org/>                       530 - <https://www.mcelog.org/>
531                                                   531 
532 cpio                                              532 cpio
533 ----                                              533 ----
534                                                   534 
535 - <https://www.gnu.org/software/cpio/>            535 - <https://www.gnu.org/software/cpio/>
536                                                   536 
537 Networking                                        537 Networking
538 **********                                        538 **********
539                                                   539 
540 PPP                                               540 PPP
541 ---                                               541 ---
542                                                   542 
543 - <https://download.samba.org/pub/ppp/>           543 - <https://download.samba.org/pub/ppp/>
544 - <https://git.ozlabs.org/?p=ppp.git>             544 - <https://git.ozlabs.org/?p=ppp.git>
545 - <https://github.com/paulusmack/ppp/>            545 - <https://github.com/paulusmack/ppp/>
546                                                   546 
547 NFS-utils                                         547 NFS-utils
548 ---------                                         548 ---------
549                                                   549 
550 - <https://sourceforge.net/project/showfiles.p    550 - <https://sourceforge.net/project/showfiles.php?group_id=14>
551 - <https://nfs.sourceforge.net/>                  551 - <https://nfs.sourceforge.net/>
552                                                   552 
553 Iptables                                          553 Iptables
554 --------                                          554 --------
555                                                   555 
556 - <https://netfilter.org/projects/iptables/ind    556 - <https://netfilter.org/projects/iptables/index.html>
557                                                   557 
558 Ip-route2                                         558 Ip-route2
559 ---------                                         559 ---------
560                                                   560 
561 - <https://www.kernel.org/pub/linux/utils/net/    561 - <https://www.kernel.org/pub/linux/utils/net/iproute2/>
562                                                   562 
563 OProfile                                          563 OProfile
564 --------                                          564 --------
565                                                   565 
566 - <https://oprofile.sf.net/download/>             566 - <https://oprofile.sf.net/download/>
567                                                   567 
568 Kernel documentation                              568 Kernel documentation
569 ********************                              569 ********************
570                                                   570 
571 Sphinx                                            571 Sphinx
572 ------                                            572 ------
573                                                   573 
574 - <https://www.sphinx-doc.org/>                   574 - <https://www.sphinx-doc.org/>
                                                      

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